And for number of appearances in video games: (giantbomb.com)
Storm: 44
Jean Grey: 30
Rogue: 24
Psylocke: 27
Black Widow: 18
Carol Danvers: 10
She-Hulk: 13
Invisible Woman: 19
Mystique: 22
Elektra: 12
Scarlet Witch: 15
Spider-Woman: 8
White Queen: 14
Shadowcat: 9
Wasp: 7
Squirrel Girl: 4 Hehehe.
I am surprised that Psylocke actually appeared to more video games than Rogue.